Battery pack busbar and battery pack

Abstract

The utility model relates to new energy battery accessory technical field, concretely relates to a battery package guide strip and battery package. The guide strip body is equipped with at least one guide groove along the length direction, and the inner wall of guide groove is equipped with lubricating coating to reduce the friction resistance when the electric core assembly slides. The guide strip body is equipped with the cooperation structure for quick connection fixed with the battery package frame, and the guide strip is conveniently assembled or disassembled in the battery package frame. The guide strip body surface is equipped with the reinforcing rib, and the guide strip structure strength is enhanced to satisfy the mechanical bearing requirement in the battery package. The utility model further provides a kind of battery package, and the battery package is equipped with above-mentioned guide strip, and the electric core in battery package is loaded into battery package by guide strip. Through the above structural design, the utility model satisfies the lightweight, low cost, easy maintenance demand of battery package, and the strength and guiding precision of lightweight material are considered, and the quick assembly and replacement of electric core in battery package are realized.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery accessories technology, specifically to a battery pack guide strip and a battery pack. Background Technology

[0002] The power battery pack is a core component of electric vehicles and other new energy equipment, accounting for approximately 20% to 30% of the total vehicle weight and being one of the components with the highest cost. Achieving battery pack lightweighting is crucial for improving overall vehicle performance while meeting energy storage requirements: research shows that a 10% reduction in the weight of an electric vehicle can increase its driving range by about 10%. Therefore, the industry widely uses lightweight materials such as aluminum alloys, magnesium alloys, and composite materials to reduce the structural weight of the battery pack. Among these, composite materials such as glass fiber reinforced plastics have advantages such as light weight, good insulation, and simple molding processes, and have been widely used in lightweight battery pack design. However, the stiffness and strength of lightweight non-metallic materials (such as engineering plastics) are often lower than those of metallic materials, posing challenges in meeting mechanical strength requirements. Furthermore, the battery pack structural design must ensure that it does not deform or malfunction under mechanical loads such as vibration and impact, and provide sufficient protection for the cells in accidents such as collisions and drops. How to achieve lightweighting while ensuring structural strength and safety has become a key challenge in battery pack design.

[0003] On the other hand, the installation and maintenance of existing battery pack cells are generally quite complex, making it difficult to meet the needs of rapid assembly and replacement. In traditional designs, cells are often fixed to modules or frames using bolts, adhesives, or other methods. For example, some battery packs use structural adhesive to bond and fix the cells, which, while reliable, makes disassembly and assembly difficult; other designs use screws to lock the cells, increasing assembly steps and weight. Even when a snap-fit ​​structure is used to fix the cells, the lack of good guidance and lubrication results in high frictional resistance during cell insertion, easily wearing down positioning components and affecting assembly efficiency and accuracy. Furthermore, some designs using plastic brackets or guide rails have revealed problems such as insufficient rigidity and easy wear and deformation in practical applications, leading to decreased guiding accuracy and even making it impossible to simultaneously achieve high strength and high precision.

[0004] Currently, using guide bars within the battery pack for cell fixation and installation is a superior solution. These guide bars are mostly made of metal (such as steel or aluminum), which, while possessing high strength, suffer from drawbacks including heavy weight, susceptibility to corrosion, high processing costs, and high friction during assembly leading to cell wear. With the increasing demand for lightweight, low-cost, and easy-to-maintain battery packs in the new energy sector, traditional metal guide bars are no longer sufficient. While existing plastic components are lightweight, they struggle to balance strength and guiding accuracy, and are not specifically designed for the rapid assembly and replacement of cells within the battery pack. Therefore, a new type of guide bar that combines lightweight design, low friction coefficient, and high assembly efficiency is urgently needed. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a novel battery pack guide strip and battery pack, so as to simultaneously meet the requirements of lightweight, low cost, and easy maintenance of the battery pack, as well as the requirements of strength and guiding accuracy of the guide strip, and adapt to the needs of rapid assembly and replacement of battery cells within the battery pack. To achieve the above objectives, this utility model adopts the following technical solution: Guide groove 131 and lubricating coating 133: A guide bar 13 is provided, made of a non-metallic lightweight material. The guide bar 13 body has at least one guide groove 131 along its length. The guide groove 131 is used to accommodate and guide the battery cells in the battery pack. To reduce the frictional resistance during the insertion or sliding of the battery cells, a lubricating coating 133 is provided on the inner wall of the guide groove. This lubricating layer has an extremely low coefficient of friction, enabling oil-free lubrication, reducing wear, and reducing the force required for assembly, allowing the battery cells to slide smoothly into position.

[0006] Quick-connection and fixing structure: The guide strip 13 body is provided with a mating structure 132 that cooperates with the battery pack frame 11, for convenient installation and fixing of the guide strip 13 onto the inner frame of the battery pack frame. For example, the guide strip 13 body integrates a snap-fit ​​structure that can snap and lock with the corresponding structure on the frame, realizing quick installation and removal of the guide strip 13. The snap-fit ​​engagement allows for tool-free fixing, making installation and removal convenient and reliable. This quick-connection design ensures that the guide strip 13 can be quickly positioned and fixed during assembly, meeting the requirements of easy maintenance and replacement of the battery pack 1.

[0007] Reinforcing rib 134 structure: Reinforcing ribs 134 are provided on the outer surface or at structurally weak points of the guide bar 13 body to improve the overall structural rigidity and strength of the guide bar 13. By adding reinforcing ribs 134 to the guide bar 13, its bending and torsional resistance can be effectively enhanced. The reinforcing ribs 134 are integrally formed with the guide bar 13 and arranged in key parts, such as the connection between the guide bar 13 and the frame, to ensure that the guide bar 13 is not easily deformed when bearing the weight of the battery cell and vehicle vibration, thus meeting the mechanical load-bearing requirements inside the battery pack 1.

[0008] Overall Structure of Battery Pack 1: This utility model also provides a battery pack 1, including a battery pack frame 11 and a plurality of battery cells 12. The battery pack frame 11 has multiple guide strips 13 as described above inside. The battery cells are quickly assembled into the battery pack frame 11 and positioned and fixed under the guidance of the guide grooves 131 of the guide strips 13. Preferably, the guide strips 13 are installed on the frame structure of the battery pack frame 11 by embedding or snap-fitting, thereby forming a detachable guide and support frame for the battery cells 12. Through the mating structure 132 provided on the guide strips 13, the guide strips 13 are firmly fixed inside the frame, and the guide strips 13 can be quickly disassembled and replaced or their layout adjusted when needed. The above design enables the battery pack 1 to achieve both lightweight and modular design, facilitating the rapid assembly and replacement of battery cell modules of different specifications. It has advantages such as simple structure, convenient assembly and maintenance, and wide adaptability.

[0009] Compared with existing technologies, this utility model has the following advantages: By setting a non-metallic lightweight material guide strip with a lubricating guide groove inside the battery pack frame, the sliding quick assembly of the battery cells is realized, reducing assembly friction resistance and labor intensity; the guide strip is reliably positioned and fastened to the battery pack frame through buckles or similar quick-connect structures on the guide strip, making structural assembly and disassembly more convenient; the reinforcing rib design improves the mechanical strength and durability of the guide strip. This utility model meets the needs of lightweight, low-cost, and easy-to-maintain battery packs, as well as the application needs of quick assembly and replacement of battery cells within the battery pack. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the cross-sectional structure of a battery pack guide bar and a battery pack according to the present invention; Figure 2 This is a schematic diagram of the structure of each component of the battery pack guide bar of this utility model; Figure 3 This is a three-dimensional structural diagram of the conductor strip of the first battery pack of this utility model.

[0011] The diagram is labeled as follows: 1-Battery pack, 11-Battery pack frame, 12-Battery cell, 13-Conductor bar, 13a-First battery pack guide bar, 13b-Second battery pack guide bar, 131-Guide groove, 132-Matching structure, 133-Lubricating coating, 134-Reinforcing rib. Detailed Implementation

[0012] The structure and usage of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the features of the following embodiments can be combined with each other to obtain new implementation schemes.

[0013] Example 1 like Figure 1-3As shown, this embodiment provides a arrangement scheme for the guide strips 13 inside the battery pack. Five sets of guide strips 13 are installed at the four corners (upper left, lower left, upper right, lower right) and the center of the bottom of the internal frame of the battery pack frame 11, respectively, to support and guide the installation of the battery cells 12. The first battery pack guide strip 13a located at the upper left, lower left, upper right, and lower right positions has an "L"-shaped cross-section, while the second battery pack guide strip 13b located at the center of the bottom has a trapezoidal cross-section. The two perpendicularly intersecting sides of the L-shaped first battery pack guide strips 13a at the four corners combine with "U"-shaped sections, serving as both a mating structure 132 and a reinforcing rib 134 to improve the rigidity of the structure on both sides. Due to the design of its shape and structure, the trapezoidal second battery pack guide strip 13b at the bottom does not require additional reinforcing ribs. All guide strips 13 have guide grooves 131 on their surfaces facing the inside of the battery pack. The inner walls of the guide grooves are coated with a polytetrafluoroethylene lubricating coating 133 with a thickness of approximately 0.1 mm to significantly reduce sliding friction during cell insertion. Preferably, the lubricating coating 133 covers the entire length of the inner wall of the guide groove, forming a uniform, smooth, low-friction interface.

[0014] Regarding the quick installation and fixing of the guide strips 13, the four L-shaped first battery pack guide strips 13a and the bottom trapezoidal second battery pack guide strips 13b are each equipped with a mating structure 132 for engaging with the battery pack frame. Specifically, each of the L-shaped first battery pack guide strips 13a has a mating structure 132 at the ends of its two perpendicular arms and at the joint where the two arms intersect. These mating structures 132 are elastic buckles integrally formed with the guide strip body, and their shape can be a hook-shaped protrusion or a bump, etc. When the guide strips 13 are installed onto the battery pack frame 11, the buckles at the ends of the two arms of the L-shaped first battery pack guide strips 13a respectively engage with the corresponding slots or holes in the frame, while the buckles at the intersection of the two arms of the L-shaped first battery pack guide strips 13a are inserted into the pre-reserved holes in the frame along the corner axis direction to achieve fixing and locking at that point. The bottom of the trapezoidal second battery pack guide strip 13b is also provided with a mating structure 132, which can be inserted into the mating hole groove of the bottom frame of the battery pack frame 11 to firmly fix the trapezoidal guide strip to the bottom position. After the above mating structure is installed, it will automatically lock. When disassembly is required, the guide strip 13 can be removed by squeezing the elastic arm of the buckle or prying the buckle hook to disengage it from the buckle groove.

[0015] The assembly process of the battery cells 12 within the battery pack is greatly simplified by utilizing the aforementioned guide strips 13. Multiple individual battery cells are aligned with the guide grooves 131 of the adjacent guide strips 13 during installation, with their bottoms and tops slidingly engaging in the guide grooves 131 of the lower and upper guide strips 13, respectively. The assembler simply pushes the battery cell 12 along the guide groove 131, and the cell 12 slides into place under the guidance of the guide strips 13. Because the PTFE lubricating layer 133 on the inner wall of the guide groove 131 significantly reduces frictional resistance, the sliding of the battery cell 12 is very smooth, requiring minimal effort to push it into the designated position. After the battery cell 12 is assembled, the guide strips 13 provide limiting support in the up, down, left, and right directions, ensuring that each battery cell 12 is securely positioned within the battery pack frame 11 without any shaking or displacement. When it is necessary to replace a certain cell 12, simply release the relevant constraints and slide the cell 12 out of the guide groove 131 in reverse order. This eliminates the need to disassemble a large number of fasteners, thereby greatly improving maintenance efficiency.

[0016] Furthermore, the guide bar 13 in this embodiment can be easily installed and removed thanks to the snap-fit ​​structure on the guide bar 13 and its cooperation with the frame. When it is necessary to adjust the layout of the guide bar 13 or replace the guide bar 13, the snap-fit ​​structure of the guide bar 13 can be released first, the old guide bar can be removed, and then the new guide bar can be aligned with the frame position and pressed in. The snap-fit ​​will automatically spring into the pre-set hole slot of the frame to complete the fixation. The whole process does not require screw tightening and is very quick. This modular design concept is similar to using the guide rails and support components inside the battery pack as standardized parts. When different sizes or types of battery cell 12 modules need to be configured, the corresponding specifications of the guide bar 13 can be replaced to adapt, thereby improving the adaptability of the battery pack 1 to various battery cell 12 specifications.

[0017] Example 2 In this embodiment, the mating structure on the guide strip 13 adopts a magnetic attraction design. Specifically, a high-magnetic-force permanent magnet can be embedded at a predetermined position on the guide strip 13 body, and a magnetic metal or matching magnet that attracts it is placed at a corresponding position on the battery pack frame 11. When the guide strip 13 is installed, the magnet and the magnetic components on the frame attract each other, allowing the guide strip to be quickly positioned and fixed. This magnetic attraction connection method has a simple structure and is quick to assemble and disassemble, making it particularly suitable for occasions requiring frequent assembly and disassembly.

[0018] Example 3 In this embodiment, the guide strip 13 can be connected and fixed to the battery pack frame 11 via a hook-and-loop structure. A protruding hook is provided at the end of the guide strip 13, and a slot or hole is provided at the corresponding position in the frame. During installation, the hook of the guide strip 13 is inserted into the frame slot and then pressed down or slid laterally, using the geometric engagement of the structure to lock the guide strip. To improve the load-bearing capacity and lifespan of the hook, a reinforcing rib 134 can be added to the end of the hook or guide strip to prevent breakage caused by repeated insertion and removal. The slot-hook structure requires no additional parts, provides reliable locking, and is easy to disassemble.

[0019] Example 4 In this embodiment, a quick-release locking structure is used to fix the guide bar 13. This quick-release locking structure can be a combination of a lever-type or a mechanical type. A rotatable or flip-type clamping latch is provided at the junction of the guide bar and the frame. After installing the guide bar, flipping the latch will clamp it in place; to unlock, flip it back to release it. The principle is to use a lever mechanism to lock / unlock the connector in one step. Applying this type of quick-release latch to guide bar fixing can achieve second-level assembly and disassembly operations while ensuring high locking force.

[0020] It should be noted that the embodiments of this utility model have been described in detail above, but these descriptions are not intended to limit the scope of protection of this utility model. Those skilled in the art can make various modifications and improvements without departing from the principle of this utility model, and these should all be considered equivalent modifications and fall within the scope of protection of this utility model.

Claims

1. A battery pack conductor strip, characterized in that, The guide bar (13) body is provided with at least one guide groove (131) along the length direction. The inner sidewall of the guide groove (131) is provided with a lubricating coating (133) to reduce the sliding friction during cell assembly. The guide bar (13) body is provided with a mating structure (132) for quick connection and fixation with the battery pack frame (11). The guide bar (13) body is provided with reinforcing ribs (134).

2. The battery pack guide strip as described in claim 1, characterized in that, The mating structure is a snap-fit ​​structure.

3. A battery pack guide strip as described in claim 1, characterized in that, The mating structure is a magnetic connection structure.

4. A battery pack guide strip as described in claim 1, characterized in that, The mating structure is a hook-and-loop structure.

5. A battery pack conductor strip as described in claim 1, characterized in that, The mating structure is a quick-locking structure.

6. A battery pack, comprising a battery pack frame (11) and a plurality of battery cells (12), characterized in that, At least one guide bar (13) as described in any one of claims 1-5 is installed inside the battery pack frame (11).

7. A battery pack as described in claim 6, characterized in that, The battery pack (1) is provided with five battery pack guide strips (13). A first battery pack guide strip (13a) with an L-shaped cross section is provided at the upper left, lower left, upper right and lower right positions inside the battery pack frame (11). A second battery pack guide strip (13b) with a trapezoidal cross section is provided at the bottom center position inside the battery pack frame (11).

8. A battery pack as described in claim 7, characterized in that, The guide bar (13) has a guide groove (131) facing the inside of the battery pack; the connection point of the two mutually perpendicular sides of the first battery pack guide bar (13a) and the two ends opposite to the connection point are provided with a quick connection and fixing fit structure (132), and the two ends of the trapezoidal bottom of the second battery pack guide bar (13b) are also provided with a quick connection and fixing fit structure (132); the inner wall of the guide groove is sprayed with a polytetrafluoroethylene lubricating coating (133); the connection point of the two mutually perpendicular sides of the first battery pack guide bar (13a) serves as a fit structure (132) and also functions as the reinforcing rib (134).

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